43 citations · 89 across the 7 of their papers we have counts for
7 papers
Leaf: Multiple-Choice Question Generation
Kristiyan Vachev, Momchil Hardalov, Georgi Karadzhov +3
Testing with quiz questions has proven to be an effective way to assess and improve the educational process. However, manually creating quizzes is tedious and time-consuming. To ad…
Feature-Rich Named Entity Recognition for Bulgarian Using Conditional Random Fields
Georgi Georgiev, Preslav Nakov, Kuzman Ganchev +2
The paper presents a feature-rich approach to the automatic recognition and categorization of named entities (persons, organizations, locations, and miscellaneous) in news text for…
Exposing Paid Opinion Manipulation Trolls
Todor Mihaylov, Ivan Koychev, Georgi Georgiev +1
Recently, Web forums have been invaded by opinion manipulation trolls. Some trolls try to influence the other users driven by their own convictions, while in other cases they can b…
Generating Answer Candidates for Quizzes and Answer-Aware Question Generators
Kristiyan Vachev, Momchil Hardalov, Georgi Karadzhov +3
In education, open-ended quiz questions have become an important tool for assessing the knowledge of students. Yet, manually preparing such questions is a tedious task, and thus au…
Feature-Rich Part-of-speech Tagging for Morphologically Complex Languages: Application to Bulgarian
Georgi Georgiev, Valentin Zhikov, Petya Osenova +2
We present experiments with part-of-speech tagging for Bulgarian, a Slavic language with rich inflectional and derivational morphology. Unlike most previous work, which has used a…
Where Classification Fails, Interpretation Rises
Chanh Nguyen, Georgi Georgiev, Yujie Ji +1
An intriguing property of deep neural networks is their inherent vulnerability to adversarial inputs, which significantly hinders their application in security-critical domains. Mo…